This paper proposes and analyzes a mathematical model for the production of bioethanol in continuous bioreactor with recycling. The kinetics correspond to use Saccharomyces bayanus fermentation sugars found wastewater from soft drinks. proposed considers product growth latency, which was experimentally batch studies ethanol production. Furthermore, inhibition effect is expressed by modified ver...

Definition ....................................................................... Methods for determining FRC ................................... Choice of method FRC measured by plethysmography (FRCpleth) ......... FRC measured by helium dilution (FRCHe) ............. FRC measured by nitrogen washout (FRCN2) ........... Standards for lung volume measurement by gas dilution/washout techniques ...

N-Type calcium channel antagonists may suppress sympathetic activity. The purpose of this study was to assess the effects of amlodipine and cilnidipine on the cardiac sympathetic nervous system and the neurohormonal status of essential hypertension. 123I-metaiodobenzylguanidine (MIBG) cardiac imaging was performed and blood samples were taken to determine plasma renin activity and plasma norepi...

Acrylate is a popular polymer grouting material that has been widely used to control groundwater seepage. However, the vulnerability of acrylate slurry dynamic water washout restricts its application in environments characterized by high flow velocity and pressures. In this paper, lithium bentonite (Li-B) was modify traditional magnesium (AC) material. The influence Li-B AC ratios on modified m...

N,N-Dimethylformamide (DMF) affects cellular differentiation, causes hepatotoxicity and gastric irritation, and may be carcinogenic. Since these processes involve changes in cellular pH homeostasis, we investigated the effects of DMF on H+ extrusion and cytosolic pH (pHi) of mouse hepatoma cells (Hepa 1C1C7). Extracellular pH was monitored using a silicon-based sensor system (Cytosensor microph...

This study analyzed the performances of a hybrid membrane aerated biofilm reactor (MABR) pilot plant in terms nutrients removal attached growth and suspended biomass comparison with conventional activated sludge (CAS) system at different retention time (SRT) (20−3) days. Overall, MABR showed better than CAS TSS (86% vs 79%), COD (89% 85%) total nitrogen (80% 65%). The minimum SRT for achieving ...

OBJECTIVE To investigate the hypothesis that the time to washout of radiographic contrast medium trapped distal to an occluded collateral receiving vessel is inversely related to collateral flow, and that this provides an accurate method for characterising coronary collaterals. METHODS An intracoronary pressure derived collateral flow index was determined in 54 patients undergoing percutaneou...